... I think there are standards in Gospels music. They would Hymns, Congregational songs and basic service music that is done at your particular church. Example most churches I have played for on first Sundays do "I know it was the Blood". There are hundreds if not thousands of songs you are kind of expected to know on the bass ...
Absolutely, positively, without a doubt
THIS ^I know I'm speaking primarily from a Black church, Baptist perspective but there are a whole bunch of songs you re expected to know as a bass player ...
The Blood Will Never Lose its Power
At the Cross
Near the Cross
Amazing Grace
Precious Lord
Bless That Wonderful Name of Jesus
What he's Done For Me
In the Name of Jesus
... and that's just off the top of my head.
The good news is that those songs are all basic progressions and many of them are the SAME progression. But as a bass player, you have to know them or be able to catch on and/or fake them.